in contact with or supported from below by
There's a fly on the ceiling
Can you stand on one foot?
attached or fastened to
She had a dog on a lead
carried on the person of
Have you got a match on you?
very near to, esp along an edge or border
He visited a number of towns on the frontier
Walton-on-Thames
within the limits of an area
There are deer on the hills
There's a picture on page 17
at the usual standard or level of
He was on form tonight
positioned at or towards
On his right was the then president
in the direction of; against
The protesters marched on Westminster
with regard to; concerning
She's very keen on sports
staked on the success of
I had £5 on his horse
doing or carrying out a specified action or activity
I'm here on business
working for, supporting, or belonging to
He's on their side
working at or in charge of
I'll ask the man on the gate
having as a basis or source, e.g. of knowledge or comparison
I have it on good authority
Prices are down on last year
at the expense of; paid for by
Drinks are on the house
in the state or process of
The house is on fire
Why don't we buy it while it's on offer?
in the specified state, process, manner, etc
I got it on the cheap
using as a medium
She played it on the clarinet
using by way of transport
He left on the early train
sustained or powered by
We live on vegetables
He's on a low income
regularly taking
Hundreds of teachers are on Valium
at the time of or on the occasion of
You can get the books cash on delivery
on the occasion of or immediately after and usu in consequence of
He fainted on hearing the news
in the course of
I saw Van Morrison when he was on tour